[002/119] cifs: dont use CIFSGetSrvInodeNumber in is_path_accessible

Greg KH
2009-12-07T00:37:56Z

[-- Attachment #1: cifs-don-t-use-cifsgetsrvinodenumber-in-is_path_accessible.patch --]
[-- Type: text/plain, Size: 1468 bytes --]

2.6.31-stable review patch. If anyone has any objections, please let us know.

------------------
From: Jeff Layton <jlayton@redhat.com>

commit f475f6775465283494346663f201ad04810d2e8a upstream.

Because it's lighter weight, CIFS tries to use CIFSGetSrvInodeNumber to
verify the accessibility of the root inode and then falls back to doing a
full QPathInfo if that fails with -EOPNOTSUPP. I have at least a report
of a server that returns NT_STATUS_INTERNAL_ERROR rather than something
that translates to EOPNOTSUPP.

Rather than trying to be clever with that call, just have
is_path_accessible do a normal QPathInfo. That call is widely
supported and it shouldn't increase the overhead significantly.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
fs/cifs/connect.c | 8 --------
1 file changed, 8 deletions(-)

--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2200,16 +2200,8 @@ is_path_accessible(int xid, struct cifsT
struct cifs_sb_info *cifs_sb, const char *full_path)
{
int rc;
- __u64 inode_num;
FILE_ALL_INFO *pfile_info;

- rc = CIFSGetSrvInodeNumber(xid, tcon, full_path, &inode_num,
- cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
- if (rc != -EOPNOTSUPP)
- return rc;
-
pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
if (pfile_info == NULL)
return -ENOMEM;